Whats the minamin PCI or AGP NVidia Video card you can use for COD 4?

Whats the minamin PCI or AGP NVidia Video card you can use for COD 4, I know you can use ATI X300 128 MB fir it,|||That all depends. If your system has a graphics card good enough but other system resources are lacking, you might have issues. But on my other machine I was running it on an 9600xt 256mb it ran it ok on a p4 400fsb 2.2ghz 1024mb RAMBUS, surprisingly.|||NVIDIA® Geforce 6600, Geforce 7800 + recommended